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Can You Predict What Happens in a Permissive Under-Reaching Transfer Trip (PUTT) Scheme?
The Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Permissive Under-Reaching Transfer Trip (PUTT) Scheme. This bonus animation shows the steps involved for a PUTT trip.
End-to-end testers should understand how this scheme operates before they test it and this animation was created to help relay testers understand distance relay principles.
Click on the following image to open an animation to see if you can accurately predict what will happen at different fault locations with a Permissive Under-Reaching Transfer Trip (PUTT) Scheme.
Press “What happens Next” to move through the animation. Press “Move the Fault” to change the fault location.
You can watch this animation in action here:
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sir how will i implement 765kv line by using quadrilateral relay technique. Please help me in providing the circuit for this. I have to measure for 200km line at a limitation of 230V/12V transformer for single line to ground fault.
You should model the system and then use best practices to create your settings.